Sweden. Air mail cover Facit 231, bKd7 cover, 10 öre on double postcard sent insufficiently prepaid from BORÅS 5.7.31 to Germany. Cancellations T, MIT LUFTPOST BEFÖRDERT BERLIN C2 LUFTPOSTAMT and BERLIN C 6.7.31. Postage due notation "20" (pf). Cancel penetration. Reply part unused.